<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--table表格标签；border表格线粗细-->
<table border="10px" >
    <tr>
        <td colspan="2">1-1</td>
<!--        <td>1-2</td>-->
        <td>1-3</td>
        <td rowspan="2">1-4</td>
    </tr>
    <tr>
        <td>2-1</td>
        <td>2-2</td>
        <td>2-3</td>
<!--        <td>2-4</td>-->
    </tr>
    <tr>
        <td>3-1</td>
        <td>3-2</td>
        <td>3-3</td>
        <td>3-4</td>
    </tr>
    <tr>
        <td>4-1</td>
        <td>4-2</td>
        <td>4-3</td>
        <td>4-4</td>
    </tr>
</table>
<table border="10px"  >
    <caption>表格标题</caption>
    <tr>
        <!--colspan合并列；rowspan合并行-->
        <th colspan="2">1-1</th><!--表头：加粗并居中-->
        <td rowspan="2">1-2</td>
<!--        <td>1-3</td>-->
    </tr>
    <tr>
        <td rowspan="2">2-1</td>
<!--        <td>2-2</td>-->
        <td>2-2</td>
    </tr>
    <tr>
<!--        <td>3-1</td>-->
        <td colspan="2">3-2</td>
<!--        <td>3-3</td>-->
    </tr>
</table>
</body>
</html>